summaryrefslogtreecommitdiff
path: root/cpu/pxa/pxafb.c
blob: ef60d4a84b4168ec4724366e6bcc38cf70053e26 (plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
420
421
422
423
424
425
426
427
428
429
430
431
432
433
434
435
436
437
438
439
440
441
442
443
444
445
446
447
448
449
450
451
452
453
454
455
456
457
458
459
460
461
462
463
464
465
466
467
468
469
470
471
472
473
474
475
476
477
478
479
480
481
482
483
484
485
486
487
488
489
490
491
492
493
494
495
496
497
498
499
500
501
502
503
504
505
506
507
508
509
510
511
512
513
514
515
516
517
518
519
520
521
522
523
524
525
526
527
528
529
530
531
532
533
534
535
536
537
538
539
540
541
542
543
544
545
546
547
548
549
550
551
552
553
554
555
556
557
558
559
560
561
562
563
564
565
566
567
568
569
570
571
572
573
574
575
576
577
578
579
580
581
582
583
584
585
586
587
588
589
590
591
592
593
594
595
596
597
598
599
600
601
602
603
604
605
606
607
608
609
610
611
612
613
614
615
616
617
618
619
620
621
622
623
624
625
626
627
628
629
630
631
632
633
634
635
636
637
638
639
640
641
642
643
644
645
646
647
648
649
650
651
652
653
654
655
656
657
658
659
660
661
662
663
664
665
666
667
668
669
670
671
672
673
674
675
676
677
678
679
680
681
682
683
684
685
686
687
688
689
690
691
692
693
694
695
696
697
698
699
700
701
702
703
704
705
706
707
708
709
710
711
712
713
714
715
716
717
718
719
720
721
722
723
724
725
726
727
728
729
730
731
732
733
734
735
736
737
738
739
740
741
742
743
744
745
746
747
748
749
750
751
752
753
754
755
756
757
758
759
760
761
762
763
764
765
766
767
768
769
770
771
772
773
774
775
776
777
778
779
780
781
782
783
784
785
786
787
788
789
790
791
792
793
794
795
796
797
798
799
800
801
802
803
804
805
806
807
808
809
810
811
812
813
814
815
816
817
818
819
820
821
822
823
824
825
826
827
828
829
830
831
832
833
834
835
836
837
838
839
840
841
842
843
844
845
846
847
848
849
850
851
852
853
854
855
856
857
858
859
860
861
862
863
864
865
866
867
868
869
870
871
872
873
874
875
876
877
878
879
880
881
882
883
884
885
886
887
888
889
890
891
892
893
894
895
896
897
898
899
900
901
902
903
904
905
906
907
908
909
910
911
912
913
914
915
916
917
918
919
920
921
922
923
924
925
926
927
928
929
930
931
932
933
934
935
936
937
938
939
940
941
942
943
944
945
946
947
948
949
950
951
952
953
954
955
956
957
958
959
960
961
962
963
964
965
966
967
968
969
970
971
972
973
974
975
976
977
978
979
980
981
982
983
984
985
986
987
988
989
990
991
992
993
994
995
996
997
998
999
1000
1001
1002
1003
1004
1005
1006
1007
1008
1009
1010
1011
1012
1013
1014
1015
1016
1017
1018
1019
1020
1021
1022
1023
1024
1025
1026
1027
1028
1029
1030
1031
1032
1033
1034
1035
1036
1037
1038
1039
1040
1041
1042
1043
1044
1045
1046
1047
1048
1049
1050
1051
1052
1053
1054
1055
1056
1057
1058
1059
1060
1061
1062
1063
1064
1065
1066
1067
1068
1069
1070
1071
1072
1073
1074
1075
1076
1077
1078
1079
1080
1081
1082
1083
1084
1085
1086
1087
1088
1089
/*
 * (C) Copyright 2001-2002
 * Wolfgang Denk, DENX Software Engineering -- wd@denx.de
 *
 * See file CREDITS for list of people who contributed to this
 * project.
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU General Public License as
 * published by the Free Software Foundation; either version 2 of
 * the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.	 See the
 * GNU General Public License for more details.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program; if not, write to the Free Software
 * Foundation, Inc., 59 Temple Place, Suite 330, Boston,
 * MA 02111-1307 USA
 */

/************************************************************************/
/* ** HEADER FILES							*/
/************************************************************************/

#define DEBUG 1
#include <config.h>
#include <common.h>
#include <version.h>
#include <stdarg.h>
#include <lcdvideo.h>
#include <linux/types.h>
#include <devices.h>
#include <asm/arch/pxa-regs.h>

#ifdef CONFIG_LCD

/************************************************************************/
/* ** CONFIG STUFF -- should be moved to board config file		*/
/************************************************************************/
#ifndef CONFIG_EDT32F10
#define CONFIG_LCD_LOGO
#define LCD_INFO		/* Display Logo, (C) and system info	*/
#endif

#ifdef CONFIG_V37
#undef CONFIG_LCD_LOGO
#undef LCD_INFO
#endif

#undef CONFIG_LCD_LOGO

#define LCD_TEST_PATTERN
/* #define LCD_TEST_PATTERN */	/* color backgnd for frame/color adjust */
/* #define CFG_INVERT_COLORS */	/* Not needed - adjust vl_dp instead 	*/
/************************************************************************/

/************************************************************************/
/* ** FONT AND LOGO DATA						*/
/************************************************************************/

#include <video_font.h>		/* Get font data, width and height	*/

#ifdef CONFIG_LCD_LOGO
# include <bmp_nexus.h>		/* Get logo data, width and height	*/
#endif

/************************************************************************/
/************************************************************************/

/*
 *  Information about displays we are using.  This is for configuring
 *  the LCD controller and memory allocation.  Someone has to know what
 *  is connected, as we can't autodetect anything.
 */
#define CFG_HIGH	0	/* Pins are active high */
#define CFG_LOW		1	/* Pins are active low */

/* PXA LCD DMA descriptor */
struct pxafb_dma_descriptor {
	u_long fdadr;
	u_long fsadr;
	u_long fidr;
	u_long ldcmd;
};

/* PXA LCD info */
struct pxafb_info {

	/* Misc registers */
	u_long reg_lccr3;
	u_long reg_lccr2;
	u_long reg_lccr1;
	u_long reg_lccr0;
	u_long fdadr0;
	u_long fdadr1;

	/* DMA descriptors */
	struct pxafb_dma_descriptor * 	dmadesc_fblow;
	struct pxafb_dma_descriptor * 	dmadesc_fbhigh;
	struct pxafb_dma_descriptor *	dmadesc_palette;

	u_long		screen;		/* physical address of frame buffer */
	u_long		palette;	/* physical address of palette memory */
	u_int		palette_size;
};

typedef struct vidinfo {
    ushort	vl_col;		/* Number of columns (i.e. 640) */
    ushort	vl_row;		/* Number of rows (i.e. 480) */
    ushort	vl_width;	/* Width of display area in millimeters */
    ushort	vl_height;	/* Height of display area in millimeters */

    /* LCD configuration register.
    */
    u_char	vl_clkp;	/* Clock polarity */
    u_char	vl_oep;		/* Output Enable polarity */
    u_char	vl_hsp;		/* Horizontal Sync polarity */
    u_char	vl_vsp;		/* Vertical Sync polarity */
    u_char	vl_dp;		/* Data polarity */
    u_char	vl_bpix;	/* Bits per pixel, 0 = 1, 1 = 2, 2 = 4, 3 = 8, 4 = 16 */
    u_char	vl_lbw;		/* LCD Bus width, 0 = 4, 1 = 8 */
    u_char	vl_splt;	/* Split display, 0 = single-scan, 1 = dual-scan */
    u_char	vl_clor;	/* Color, 0 = mono, 1 = color */
    u_char	vl_tft;		/* 0 = passive, 1 = TFT */

    /* Horizontal control register.  Timing from data sheet.
    */
    ushort	vl_hpw;		/* Horz sync pulse width */
    u_char	vl_blw;		/* Wait before of line */
    u_char	vl_elw;		/* Wait end of line */

    /* Vertical control register.
    */
    u_char	vl_vpw;		/* Vertical sync pulse width */
    u_char	vl_bfw;		/* Wait before of frame */
    u_char	vl_efw;		/* Wait end of frame */

    u_char	vl_lcdac;	/* LCD AC timing */

    /* PXA LCD controller params
     */
    struct pxafb_info pxa;

} vidinfo_t;

#define LCD_MONOCHROME	0
#define LCD_COLOR2	1
#define LCD_COLOR4	2
#define LCD_COLOR8	3
#define LCD_COLOR16	4

/*----------------------------------------------------------------------*/
#define CONFIG_PXA_VGA
#ifdef CONFIG_PXA_VGA
/*
 *  LCD outputs connected to a video DAC
 */

#define LCD_BPP	LCD_COLOR8

/* you have to set lccr0 and lccr3 (including pcd) */
#define REG_LCCR0	0x003008f8
#define REG_LCCR3	0x0300FF01

/* 640x480x16 @ 61 Hz */
static vidinfo_t panel_info = {
	vl_col: 	640,
	vl_row: 	480,
	vl_width: 	640,
	vl_height: 	480,
	vl_clkp: 	CFG_HIGH,
	vl_oep: 	CFG_HIGH,
	vl_hsp: 	CFG_HIGH,
	vl_vsp: 	CFG_HIGH,
	vl_dp: 		CFG_HIGH,
	vl_bpix: 	LCD_BPP,
	vl_lbw: 	0,
	vl_splt: 	0,
	vl_clor: 	0,
	vl_lcdac: 	0,
	vl_tft: 	1,
	vl_hpw: 	40,
	vl_blw: 	56,
	vl_elw: 	56,
	vl_vpw: 	20,
	vl_bfw: 	8,
	vl_efw: 	8,
};
#endif /* CONFIG_PXA_VIDEO */

#ifdef CONFIG_SHARP_LM8V31

#define LCD_BPP	LCD_COLOR8
#define LCD_INVERT_COLORS	/* Needed for colors to be correct, but why? */

/* you have to set lccr0 and lccr3 (including pcd) */
#define REG_LCCR0	0x0030087C
#define REG_LCCR3	0x0340FF08

static vidinfo_t panel_info = {
	vl_col: 	640,
	vl_row: 	480,
	vl_width: 	157,
	vl_height: 	118,
	vl_clkp: 	CFG_HIGH,
	vl_oep: 	CFG_HIGH,
	vl_hsp: 	CFG_HIGH,
	vl_vsp: 	CFG_HIGH,
	vl_dp: 		CFG_HIGH,
	vl_bpix: 	LCD_BPP,
	vl_lbw: 	0,
	vl_splt: 	1,
	vl_clor: 	1,
	vl_lcdac: 	0,
	vl_tft: 	0,
	vl_hpw: 	1,
	vl_blw: 	3,
	vl_elw: 	3,
	vl_vpw: 	1,
	vl_bfw: 	0,
	vl_efw: 	0,
};
#endif /* CONFIG_SHARP_LM8V31 */

/*----------------------------------------------------------------------*/

/*----------------------------------------------------------------------*/

#if defined(LCD_INFO_BELOW_LOGO)
# define LCD_INFO_X		0
# define LCD_INFO_Y		(BMP_LOGO_HEIGHT + VIDEO_FONT_HEIGHT)
#elif defined(CONFIG_LCD_LOGO)
# define LCD_INFO_X		(BMP_LOGO_WIDTH + 4 * VIDEO_FONT_WIDTH)
# define LCD_INFO_Y		(VIDEO_FONT_HEIGHT)
#else
# define LCD_INFO_X		(VIDEO_FONT_WIDTH)
# define LCD_INFO_Y		(VIDEO_FONT_HEIGHT)
#endif

#ifndef LCD_BPP
#define LCD_BPP			LCD_COLOR8
#endif
#ifndef LCD_DF
#define LCD_DF			1
#endif

#define NBITS(bit_code)		(1 << (bit_code))
#define NCOLORS(bit_code)	(1 << NBITS(bit_code))

static int lcd_line_length;

static int lcd_color_fg;
static int lcd_color_bg;

static char lcd_is_enabled = 0;		/* Indicate that LCD is enabled	*/

/*
 * Frame buffer memory information
 */
static void *lcd_base;			/* Start of framebuffer memory	*/
static void *lcd_console_address;	/* Start of console buffer	*/


/************************************************************************/
/* ** CONSOLE CONSTANTS							*/
/************************************************************************/

#if LCD_BPP == LCD_MONOCHROME

/*
 * Simple color definitions
 */
#define CONSOLE_COLOR_BLACK	 0
#define CONSOLE_COLOR_WHITE	 1	/* Must remain last / highest */

#elif 	LCD_BPP == LCD_COLOR8

/*
 * Simple color definitions
 */
#define CONSOLE_COLOR_BLACK	 0
#define CONSOLE_COLOR_RED	 1
#define CONSOLE_COLOR_GREEN	 2
#define CONSOLE_COLOR_YELLOW	 3
#define CONSOLE_COLOR_BLUE	 4
#define CONSOLE_COLOR_MAGENTA	 5
#define CONSOLE_COLOR_CYAN	 6
#define CONSOLE_COLOR_GREY	14
#define CONSOLE_COLOR_WHITE	15	/* Must remain last / highest */

#else /* 16 bit */

#define CONSOLE_COLOR_BLACK	 0x0000
#define CONSOLE_COLOR_WHITE	 0xffff	/* Must remain last / highest */

#endif

#if defined(CONFIG_LCD_LOGO) && (CONSOLE_COLOR_WHITE >= BMP_LOGO_OFFSET)
#error Default Color Map overlaps with Logo Color Map
#endif

/************************************************************************/

#ifndef PAGE_SIZE
#define	PAGE_SIZE	4096
#endif


/************************************************************************/
/* ** CONSOLE DEFINITIONS & FUNCTIONS					*/
/************************************************************************/

#if defined(CONFIG_LCD_LOGO) && !defined(LCD_INFO_BELOW_LOGO)
#define CONSOLE_ROWS		((panel_info.vl_row-BMP_LOGO_HEIGHT) \
					/ VIDEO_FONT_HEIGHT)
#else
#define CONSOLE_ROWS		(panel_info.vl_row / VIDEO_FONT_HEIGHT)
#endif
#define CONSOLE_COLS		(panel_info.vl_col / VIDEO_FONT_WIDTH)
#define CONSOLE_ROW_SIZE	(VIDEO_FONT_HEIGHT * lcd_line_length)
#define CONSOLE_ROW_FIRST	(lcd_console_address)
#define CONSOLE_ROW_SECOND	(lcd_console_address + CONSOLE_ROW_SIZE)
#define CONSOLE_ROW_LAST	(lcd_console_address + CONSOLE_SIZE \
					- CONSOLE_ROW_SIZE)
#define CONSOLE_SIZE		(CONSOLE_ROW_SIZE * CONSOLE_ROWS)
#define CONSOLE_SCROLL_SIZE	(CONSOLE_SIZE - CONSOLE_ROW_SIZE)

#if  LCD_BPP == LCD_MONOCHROME
#define COLOR_MASK(c)		((c)      | (c) << 1 | (c) << 2 | (c) << 3 | \
				 (c) << 4 | (c) << 5 | (c) << 6 | (c) << 7)
#elif LCD_BPP == LCD_COLOR8
#define COLOR_MASK(c)		(c)
#elif LCD_BPP == LCD_COLOR16
#define COLOR_MASK(c)		(c)
#else
#error Unsupported LCD BPP.
#endif

static short console_col;
static short console_row;

/************************************************************************/

ulong	lcd_setmem (ulong addr);

static void	lcd_drawchars  (ushort x, ushort y, uchar *str, int count);
static inline void lcd_puts_xy (ushort x, ushort y, uchar *s);
static inline void lcd_putc_xy (ushort x, ushort y, uchar  c);

static int	lcd_init (void *lcdbase);
static void	lcd_ctrl_init (void *lcdbase);
static void	lcd_enable (void);
static void    *lcd_logo (void);
#if LCD_BPP == LCD_COLOR8
static void	lcd_setcolreg (ushort regno,
				ushort red, ushort green, ushort blue);
#endif
#if LCD_BPP == LCD_MONOCHROME
static void	lcd_initcolregs (void);
#endif
static void	lcd_setfgcolor (int color);
static void	lcd_setbgcolor (int color);

#ifdef	NOT_USED_SO_FAR
static int	lcd_getbgcolor (void);
static void	lcd_disable (void);
static void	lcd_getcolreg (ushort regno,
				ushort *red, ushort *green, ushort *blue);
static int	lcd_getfgcolor (void);
#endif	/* NOT_USED_SO_FAR */


static int pxafb_init_mem(void *lcdbase, vidinfo_t *vid);
static void pxafb_setup_gpio(vidinfo_t *vid);
static void pxafb_enable_controller(vidinfo_t *vid);
static int pxafb_init(vidinfo_t *vid);

/************************************************************************/

/*----------------------------------------------------------------------*/

static void console_scrollup (void)
{
	/* Copy up rows ignoring the first one */
	memcpy (CONSOLE_ROW_FIRST, CONSOLE_ROW_SECOND, CONSOLE_SCROLL_SIZE);

	/* Clear the last one */
	memset (CONSOLE_ROW_LAST, COLOR_MASK(lcd_color_bg), CONSOLE_ROW_SIZE);
}

/*----------------------------------------------------------------------*/

static inline void console_back (void)
{
	if (--console_col < 0) {
		console_col = CONSOLE_COLS-1 ;
		if (--console_row < 0) {
			console_row = 0;
		}
	}

	lcd_putc_xy (console_col * VIDEO_FONT_WIDTH,
		     console_row * VIDEO_FONT_HEIGHT,
		     ' ');
}

/*----------------------------------------------------------------------*/

static inline void console_newline (void)
{
	++console_row;
	console_col = 0;

	/* Check if we need to scroll the terminal */
	if (console_row >= CONSOLE_ROWS) {
		/* Scroll everything up */
		console_scrollup () ;
		--console_row;
	}
}

/*----------------------------------------------------------------------*/

void lcd_putc (const char c)
{
	if (!lcd_is_enabled) {
		serial_putc(c);
		return;
	}

	switch (c) {
	case '\r':	console_col = 0;
			return;

	case '\n':	console_newline();
			return;

	case '\t':	/* Tab (8 chars alignment) */
			console_col |=  8;
			console_col &= ~7;

			if (console_col >= CONSOLE_COLS) {
				console_newline();
			}
			return;

	case '\b':	console_back();
			return;

	default:	lcd_putc_xy (console_col * VIDEO_FONT_WIDTH,
				     console_row * VIDEO_FONT_HEIGHT,
				     c);
			if (++console_col >= CONSOLE_COLS) {
				console_newline();
			}
			return;
	}
	/* NOTREACHED */
}

/*----------------------------------------------------------------------*/

void lcd_puts (const char *s)
{
	if (!lcd_is_enabled) {
		serial_puts (s);
		return;
	}

	while (*s) {
		lcd_putc (*s++);
	}
}

/************************************************************************/
/* ** Low-Level Graphics Routines					*/
/************************************************************************/

static void lcd_drawchars (ushort x, ushort y, uchar *str, int count)
{
	uchar *dest;
	ushort off, row;

	dest = (uchar *)(lcd_base + y * lcd_line_length + x * (1 << LCD_BPP) / 8);
	off  = x * (1 << LCD_BPP) % 8;

	for (row=0;  row < VIDEO_FONT_HEIGHT;  ++row, dest += lcd_line_length)  {
		uchar *s = str;
		uchar *d = dest;
		int i;

#if LCD_BPP == LCD_MONOCHROME
		uchar rest = *d & -(1 << (8-off));
		uchar sym;
#endif
		for (i=0; i<count; ++i) {
			uchar c, bits;

			c = *s++;
			bits = video_fontdata[c * VIDEO_FONT_HEIGHT + row];

#if LCD_BPP == LCD_MONOCHROME
			sym  = (COLOR_MASK(lcd_color_fg) & bits) |
			       (COLOR_MASK(lcd_color_bg) & ~bits);

			*d++ = rest | (sym >> off);
			rest = sym << (8-off);
#elif LCD_BPP == LCD_COLOR8
			for (c=0; c<8; ++c) {
				*d++ = (bits & 0x80) ?
						lcd_color_fg : lcd_color_bg;
				bits <<= 1;
			}
#elif LCD_BPP == LCD_COLOR16
			for (c=0; c<16; ++c) {
				*d++ = (bits & 0x80) ?
						lcd_color_fg : lcd_color_bg;
				bits <<= 1;
			}
#endif
		}

#if LCD_BPP == LCD_MONOCHROME
		*d  = rest | (*d & ((1 << (8-off)) - 1));
#endif
	}
}

/*----------------------------------------------------------------------*/

static inline void lcd_puts_xy (ushort x, ushort y, uchar *s)
{
#if defined(CONFIG_LCD_LOGO) && !defined(LCD_INFO_BELOW_LOGO)
	lcd_drawchars (x, y+BMP_LOGO_HEIGHT, s, strlen (s));
#else
	lcd_drawchars (x, y, s, strlen (s));
#endif
}

/*----------------------------------------------------------------------*/

static inline void lcd_putc_xy (ushort x, ushort y, uchar c)
{
#if defined(CONFIG_LCD_LOGO) && !defined(LCD_INFO_BELOW_LOGO)
	lcd_drawchars (x, y+BMP_LOGO_HEIGHT, &c, 1);
#else
	lcd_drawchars (x, y, &c, 1);
#endif
}

/************************************************************************/
/**  Small utility to check that you got the colours right		*/
/************************************************************************/
#ifdef LCD_TEST_PATTERN

#define	N_BLK_VERT	2
#define	N_BLK_HOR	3

static int test_colors[N_BLK_HOR*N_BLK_VERT] = {
	CONSOLE_COLOR_RED,	CONSOLE_COLOR_GREEN,	CONSOLE_COLOR_YELLOW,
	CONSOLE_COLOR_BLUE,	CONSOLE_COLOR_MAGENTA,	CONSOLE_COLOR_CYAN,
};

static void test_pattern (void)
{
	ushort v_max  = panel_info.vl_row;
	ushort h_max  = panel_info.vl_col;
	ushort v_step = (v_max + N_BLK_VERT - 1) / N_BLK_VERT;
	ushort h_step = (h_max + N_BLK_HOR  - 1) / N_BLK_HOR;
	ushort v, h;
	uchar *pix = (uchar *)lcd_base;

	printf ("[LCD] Test Pattern: %d x %d [%d x %d]\n",
		h_max, v_max, h_step, v_step);

	/* WARNING: Code silently assumes 8bit/pixel */
	for (v=0; v<v_max; ++v) {
		uchar iy = v / v_step;
		for (h=0; h<h_max; ++h) {
			uchar ix = N_BLK_HOR * iy + (h/h_step);
			*pix++ = test_colors[ix];
		}
	}
}
#endif /* LCD_TEST_PATTERN */


/************************************************************************/
/* ** GENERIC Initialization Routines					*/
/************************************************************************/

int drv_lcd_init (void)
{
	DECLARE_GLOBAL_DATA_PTR;

	device_t lcddev;
	int rc;

	lcd_base = (void *)(gd->fb_base);

	lcd_line_length = (panel_info.vl_col * NBITS (panel_info.vl_bpix)) / 8;

	lcd_init (lcd_base);		/* LCD initialization */

	/* Device initialization */
	memset (&lcddev, 0, sizeof (lcddev));

	strcpy (lcddev.name, "lcd");
	lcddev.ext   = 0;			/* No extensions */
	lcddev.flags = DEV_FLAGS_OUTPUT;	/* Output only */
	lcddev.putc  = lcd_putc;		/* 'putc' function */
	lcddev.puts  = lcd_puts;		/* 'puts' function */

	rc = device_register (&lcddev);
	return (rc == 0) ? 1 : rc;
}

/*----------------------------------------------------------------------*/

static int lcd_init (void *lcdbase)
{
	/* Initialize the lcd controller */
	debug ("[LCD] Initializing LCD frambuffer at %p\n", lcdbase);

	lcd_ctrl_init (lcdbase);

#if LCD_BPP == LCD_MONOCHROME
	/* Setting the palette */
	lcd_initcolregs();

#elif LCD_BPP == LCD_COLOR8
	/* Setting the palette */
	lcd_setcolreg  (CONSOLE_COLOR_BLACK,       0,    0,    0);
	lcd_setcolreg  (CONSOLE_COLOR_RED,	0xFF,    0,    0);
	lcd_setcolreg  (CONSOLE_COLOR_GREEN,       0, 0xFF,    0);
	lcd_setcolreg  (CONSOLE_COLOR_YELLOW,	0xFF, 0xFF,    0);
	lcd_setcolreg  (CONSOLE_COLOR_BLUE,	0,    0, 0xFF);
	lcd_setcolreg  (CONSOLE_COLOR_MAGENTA,	0xFF,    0, 0xFF);
	lcd_setcolreg  (CONSOLE_COLOR_CYAN,	   0, 0xFF, 0xFF);
	lcd_setcolreg  (CONSOLE_COLOR_GREY,	0xAA, 0xAA, 0xAA);
	lcd_setcolreg  (CONSOLE_COLOR_WHITE,	0xFF, 0xFF, 0xFF);
#endif

#define CFG_WHITE_ON_BLACK
#ifndef CFG_WHITE_ON_BLACK
	lcd_setfgcolor (CONSOLE_COLOR_BLACK);
	lcd_setbgcolor (CONSOLE_COLOR_WHITE);
#else
	lcd_setfgcolor (CONSOLE_COLOR_WHITE);
	lcd_setbgcolor (CONSOLE_COLOR_BLACK);
#endif	/* CFG_WHITE_ON_BLACK */

#ifdef	LCD_TEST_PATTERN
	test_pattern();
#else
	/* set framebuffer to background color */
	memset ((char *)lcd_base,
		COLOR_MASK(lcd_getbgcolor()),
		lcd_line_length*panel_info.vl_row);
#endif

	lcd_enable ();

	/* Paint the logo and retrieve LCD base address */
	debug ("[LCD] Drawing the logo...\n");
	lcd_console_address = lcd_logo ();

	/* Initialize the console */
	console_col = 0;
#ifdef LCD_INFO_BELOW_LOGO
	console_row = 7 + BMP_LOGO_HEIGHT / VIDEO_FONT_HEIGHT;
#else
	console_row = 1;	/* leave 1 blank line below logo */
#endif
	lcd_is_enabled = 1;

	return 0;
}


/************************************************************************/
/* ** ROM capable initialization part - needed to reserve FB memory	*/
/************************************************************************/

/*
 * This is called early in the system initialization to grab memory
 * for the LCD controller.
 * Returns new address for monitor, after reserving LCD buffer memory
 *
 * Note that this is running from ROM, so no write access to global data.
 */
ulong lcd_setmem (ulong addr)
{
	ulong size;
	int line_length = (panel_info.vl_col * NBITS (panel_info.vl_bpix)) / 8;

	debug ("LCD panel info: %d x %d, %d bit/pix\n",
		panel_info.vl_col, panel_info.vl_row, NBITS (panel_info.vl_bpix) );

	/* extra page for dma descriptors and palette */
	size = line_length * panel_info.vl_row + PAGE_SIZE;

	/* Round up to nearest full page */
	size = (size + (PAGE_SIZE - 1)) & ~(PAGE_SIZE - 1);

	/* Allocate pages for the frame buffer. */
	addr -= size;

	debug ("Reserving %ldk for LCD Framebuffer at: %08lx\n", size>>10, addr);

	return (addr);
}


/************************************************************************/
/* ----------------- chipset specific functions ----------------------- */
/************************************************************************/

static void lcd_ctrl_init (void *lcdbase)
{
	pxafb_init_mem(lcdbase, &panel_info);
	pxafb_init(&panel_info);
	pxafb_setup_gpio(&panel_info);
	pxafb_enable_controller(&panel_info);
}

/*----------------------------------------------------------------------*/

#ifdef	NOT_USED_SO_FAR
static void
lcd_getcolreg (ushort regno, ushort *red, ushort *green, ushort *blue)
{
}
#endif	/* NOT_USED_SO_FAR */

/*----------------------------------------------------------------------*/

#if LCD_BPP == LCD_COLOR8
static void
lcd_setcolreg (ushort regno, ushort red, ushort green, ushort blue)
{
	struct pxafb_info *fbi = &panel_info.pxa;
	unsigned short *palette = (unsigned short *)fbi->palette;
	u_int val;

	if (regno < fbi->palette_size) {
		val = ((red << 8) & 0xf800);
		val |= ((green << 4) & 0x07e0);
		val |= (blue & 0x001f);

#ifdef LCD_INVERT_COLORS
		palette[regno] = ~val;
#else
		palette[regno] = ~val;
#endif
	}

	debug ("setcolreg: reg %2d @ %p: R=%02X G=%02X B=%02X => %04X\n",
		regno, &palette[regno],
		red, green, blue,
		palette[regno]);
}
#endif	/* LCD_COLOR8 */

/*----------------------------------------------------------------------*/

#if LCD_BPP == LCD_MONOCHROME
static
void lcd_initcolregs (void)
{
	volatile immap_t *immr = (immap_t *) CFG_IMMR;
	volatile cpm8xx_t *cp = &(immr->im_cpm);
	ushort regno;

	for (regno = 0; regno < 16; regno++) {
		cp->lcd_cmap[regno * 2] = 0;
		cp->lcd_cmap[(regno * 2) + 1] = regno & 0x0f;
	}
}
#endif

/*----------------------------------------------------------------------*/

static void lcd_setfgcolor (int color)
{
	lcd_color_fg = color & 0x0F;
}

/*----------------------------------------------------------------------*/

static void lcd_setbgcolor (int color)
{
	lcd_color_bg = color & 0x0F;
}

/*----------------------------------------------------------------------*/

#ifdef	NOT_USED_SO_FAR
static int lcd_getfgcolor (void)
{
	return lcd_color_fg;
}
#endif	/* NOT_USED_SO_FAR */

/*----------------------------------------------------------------------*/

#ifdef	NOT_USED_SO_FAR
static int lcd_getbgcolor (void)
{
	return lcd_color_bg;
}
#endif	/* NOT_USED_SO_FAR */

/*----------------------------------------------------------------------*/

static void lcd_enable (void)
{
}

/*----------------------------------------------------------------------*/

#ifdef	NOT_USED_SO_FAR
static void lcd_disable (void)
{
}
#endif	/* NOT_USED_SO_FAR */


/************************************************************************/
/* ** Chipset depending Bitmap / Logo stuff...				*/
/************************************************************************/

#ifdef CONFIG_LCD_LOGO
static void bitmap_plot (int x, int y)
{
	ushort *cmap;
	ushort i;
	uchar *bmap;
	uchar *fb;
	struct pxafb_info *fbi = &panel_info.pxa;

	debug ("Logo: width %d  height %d  colors %d  cmap %d\n",
		BMP_LOGO_WIDTH, BMP_LOGO_HEIGHT, BMP_LOGO_COLORS,
		sizeof(bmp_logo_palette)/(sizeof(ushort))
	);

	/* Leave room for default color map */
	cmap = (ushort *)fbi->palette;

	/* Set color map */
	for (i=0; i<(sizeof(bmp_logo_palette)/(sizeof(ushort))); ++i) {
		ushort colreg = bmp_logo_palette[i];
#ifdef	CFG_INVERT_COLORS
		colreg ^= 0xFFF;
#endif
		*cmap++ = colreg;
	}

	bmap = &bmp_logo_bitmap[0];
	fb   = (char *)(lcd_base + y * lcd_line_length + x);

	for (i=0; i<BMP_LOGO_HEIGHT; ++i) {
		memcpy (fb, bmap, BMP_LOGO_WIDTH);
		bmap += BMP_LOGO_WIDTH;
		fb   += panel_info.vl_col;
	}
}
#endif /* CONFIG_LCD_LOGO */

/*----------------------------------------------------------------------*/

static void *lcd_logo (void)
{
#ifdef CONFIG_LCD_LOGO
	DECLARE_GLOBAL_DATA_PTR;
	char info[80];
	char temp[32];

	bitmap_plot (0, 0);
#endif /* CONFIG_LCD_LOGO */

#if defined(CONFIG_LCD_LOGO) && !defined(LCD_INFO_BELOW_LOGO)
	return ((void *)((ulong)lcd_base + BMP_LOGO_HEIGHT * lcd_line_length));
#else
	return ((void *)lcd_base);
#endif	/* CONFIG_LCD_LOGO */
}

/************************************************************************
   PXA255 specific routines
************************************************************************/

static int pxafb_init_mem(void *lcdbase, vidinfo_t *vid)
{
	u_long palette_mem_size;
	struct pxafb_info *fbi = &vid->pxa;
	int fb_size = vid->vl_row * (vid->vl_col * NBITS (vid->vl_bpix)) / 8;

	fbi->screen = (u_long)lcdbase;

	fbi->palette_size = NBITS(vid->vl_bpix) == 8 ? 256 : 16;
	palette_mem_size = fbi->palette_size * sizeof(u16);
	debug("palette_mem_size = 0x%08lx\n", (u_long) palette_mem_size);
	/* locate palette and descs at end of page following fb */
	fbi->palette = (u_long)lcdbase + fb_size + 2*PAGE_SIZE - palette_mem_size;

	return 0;
}

static void pxafb_setup_gpio(vidinfo_t *vid)
{
	u_long lccr0;

	/*
	 * setup is based on type of panel supported
	 */

	lccr0 = vid->pxa.reg_lccr0;

	/* 4 bit interface */
	if ((lccr0 & LCCR0_CMS) && (lccr0 & LCCR0_SDS) && !(lccr0 & LCCR0_DPD))
	{
		debug("Setting GPIO for 4 bit data\n");
		/* bits 58-61 */
		GPDR1 |= (0xf << 26);
		GAFR1_U = (GAFR1_U & ~(0xff << 20)) | (0xaa << 20);

		/* bits 74-77 */
		GPDR2 |= (0xf << 10);
		GAFR2_L = (GAFR2_L & ~(0xff << 20)) | (0xaa << 20);
	}

	/* 8 bit interface */
	else if (((lccr0 & LCCR0_CMS) && ((lccr0 & LCCR0_SDS) || (lccr0 & LCCR0_DPD))) ||
	    (!(lccr0 & LCCR0_CMS) && !(lccr0 & LCCR0_PAS) && !(lccr0 & LCCR0_SDS)))
	{
		debug("Setting GPIO for 8 bit data\n");
		/* bits 58-65 */
		GPDR1 |= (0x3f << 26);
		GPDR2 |= (0x3);

		GAFR1_U = (GAFR1_U & ~(0xfff << 20)) | (0xaaa << 20);
		GAFR2_L = (GAFR2_L & ~0xf) | (0xa);

		/* bits 74-77 */
		GPDR2 |= (0xf << 10);
		GAFR2_L = (GAFR2_L & ~(0xff << 20)) | (0xaa << 20);
	}

	/* 16 bit interface */
	else if (!(lccr0 & LCCR0_CMS) && ((lccr0 & LCCR0_SDS) || (lccr0 & LCCR0_PAS)))
	{
		debug("Setting GPIO for 16 bit data\n");
		/* bits 58-77 */
		GPDR1 |= (0x3f << 26);
		GPDR2 |= 0x00003fff;

		GAFR1_U = (GAFR1_U & ~(0xfff << 20)) | (0xaaa << 20);
		GAFR2_L = (GAFR2_L & 0xf0000000) | 0x0aaaaaaa;
	}
	else
	{
		printf("pxafb_setup_gpio: unable to determine bits per pixel\n");
	}
}

static void pxafb_enable_controller(vidinfo_t *vid)
{
	debug("Enabling LCD controller\n");

	/* Sequence from 11.7.10 */
	LCCR3  = vid->pxa.reg_lccr3;
	LCCR2  = vid->pxa.reg_lccr2;
	LCCR1  = vid->pxa.reg_lccr1;
	LCCR0  = vid->pxa.reg_lccr0 & ~LCCR0_ENB;
	FDADR0 = vid->pxa.fdadr0;
	FDADR1 = vid->pxa.fdadr1;
	LCCR0 |= LCCR0_ENB;

	CKEN |= CKEN16_LCD;

	debug("FDADR0 = 0x%08x\n", (unsigned int)FDADR0);
	debug("FDADR1 = 0x%08x\n", (unsigned int)FDADR1);
	debug("LCCR0 = 0x%08x\n", (unsigned int)LCCR0);
	debug("LCCR1 = 0x%08x\n", (unsigned int)LCCR1);
	debug("LCCR2 = 0x%08x\n", (unsigned int)LCCR2);
	debug("LCCR3 = 0x%08x\n", (unsigned int)LCCR3);
}

static int pxafb_init(vidinfo_t *vid)
{
	struct pxafb_info *fbi = &vid->pxa;

	debug("Configuring PXA LCD\n");

	fbi->reg_lccr0 = REG_LCCR0;
	fbi->reg_lccr3 = REG_LCCR3;

	debug("vid: vl_col=%d hslen=%d lm=%d rm=%d\n",
		vid->vl_col, vid->vl_hpw,
		vid->vl_blw, vid->vl_elw);
	debug("vid: vl_row=%d vslen=%d um=%d bm=%d\n",
		vid->vl_row, vid->vl_vpw,
		vid->vl_bfw, vid->vl_efw);

	fbi->reg_lccr1 =
		LCCR1_DisWdth(vid->vl_col) +
		LCCR1_HorSnchWdth(vid->vl_hpw) +
		LCCR1_BegLnDel(vid->vl_blw) +
		LCCR1_EndLnDel(vid->vl_elw);

	fbi->reg_lccr2 =
		LCCR2_DisHght(vid->vl_row) +
		LCCR2_VrtSnchWdth(vid->vl_vpw) +
		LCCR2_BegFrmDel(vid->vl_bfw) +
		LCCR2_EndFrmDel(vid->vl_efw);

	fbi->reg_lccr3 = REG_LCCR3 & ~(LCCR3_HSP | LCCR3_VSP);
	fbi->reg_lccr3 |=
		  (vid->vl_hsp ? LCCR3_HorSnchL : LCCR3_HorSnchH)
		| (vid->vl_vsp ? LCCR3_VrtSnchL : LCCR3_VrtSnchH);


	/* setup dma descriptors */
	fbi->dmadesc_fblow = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette - 3*16);
	fbi->dmadesc_fbhigh = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette - 2*16);
	fbi->dmadesc_palette = (struct pxafb_dma_descriptor *)((unsigned int)fbi->palette - 1*16);

	#define BYTES_PER_PANEL	((fbi->reg_lccr0 & LCCR0_SDS) ? \
		(vid->vl_col * vid->vl_row * NBITS(vid->vl_bpix) / 8 / 2) : \
		(vid->vl_col * vid->vl_row * NBITS(vid->vl_bpix) / 8))

	/* populate descriptors */
	fbi->dmadesc_fblow->fdadr = (u_long)fbi->dmadesc_fblow;
	fbi->dmadesc_fblow->fsadr = fbi->screen + BYTES_PER_PANEL;
	fbi->dmadesc_fblow->fidr  = 0;
	fbi->dmadesc_fblow->ldcmd = BYTES_PER_PANEL;

	fbi->fdadr1 = (u_long)fbi->dmadesc_fblow; /* only used in dual-panel mode */

	fbi->dmadesc_fbhigh->fsadr = fbi->screen;
	fbi->dmadesc_fbhigh->fidr = 0;
	fbi->dmadesc_fbhigh->ldcmd = BYTES_PER_PANEL;

	fbi->dmadesc_palette->fsadr = fbi->palette;
	fbi->dmadesc_palette->fidr  = 0;
	fbi->dmadesc_palette->ldcmd = (fbi->palette_size * 2) | LDCMD_PAL;

	if( NBITS(vid->vl_bpix) < 12)
	{
		/* assume any mode with <12 bpp is palette driven */
		fbi->dmadesc_palette->fdadr = (u_long)fbi->dmadesc_fbhigh;
		fbi->dmadesc_fbhigh->fdadr = (u_long)fbi->dmadesc_palette;
		/* flips back and forth between pal and fbhigh */
		fbi->fdadr0 = (u_long)fbi->dmadesc_palette;
	}
	else
	{
		/* palette shouldn't be loaded in true-color mode */
		fbi->dmadesc_fbhigh->fdadr = (u_long)fbi->dmadesc_fbhigh;
		fbi->fdadr0 = (u_long)fbi->dmadesc_fbhigh; /* no pal just fbhigh */
	}

	debug("fbi->dmadesc_fblow = 0x%lx\n", (u_long)fbi->dmadesc_fblow);
	debug("fbi->dmadesc_fbhigh = 0x%lx\n", (u_long)fbi->dmadesc_fbhigh);
	debug("fbi->dmadesc_palette = 0x%lx\n", (u_long)fbi->dmadesc_palette);

	debug("fbi->dmadesc_fblow->fdadr = 0x%lx\n", fbi->dmadesc_fblow->fdadr);
	debug("fbi->dmadesc_fbhigh->fdadr = 0x%lx\n", fbi->dmadesc_fbhigh->fdadr);
	debug("fbi->dmadesc_palette->fdadr = 0x%lx\n", fbi->dmadesc_palette->fdadr);

	debug("fbi->dmadesc_fblow->fsadr = 0x%lx\n", fbi->dmadesc_fblow->fsadr);
	debug("fbi->dmadesc_fbhigh->fsadr = 0x%lx\n", fbi->dmadesc_fbhigh->fsadr);
	debug("fbi->dmadesc_palette->fsadr = 0x%lx\n", fbi->dmadesc_palette->fsadr);

	debug("fbi->dmadesc_fblow->ldcmd = 0x%lx\n", fbi->dmadesc_fblow->ldcmd);
	debug("fbi->dmadesc_fbhigh->ldcmd = 0x%lx\n", fbi->dmadesc_fbhigh->ldcmd);
	debug("fbi->dmadesc_palette->ldcmd = 0x%lx\n", fbi->dmadesc_palette->ldcmd);

	return 0;
}

/************************************************************************/
/************************************************************************/

#endif /* CONFIG_LCD */